Advertisement For me, it's the almost contradictory reasoning why I don't have interest in Theraphosa like T. stirmi etc; I have no problem with big plain brown spiders, appearance wise I actually like them, and the size impressive, it's anything but "big brown boring spider" issues some folks have. Having dealt with their urticating setae in the past though, no, just no. I'm far more likely to be whammied by those than any bite even with precautions taken, one hair is enough to get a very substantial reaction from me. The idea of needing a specific long-sleeved shirt, elbow-length gloves, a particle mask and safety glasses (which may seem like hyperbole... it isn't for me) to own these isn't appealing at all, nor having them around asthmatics when you kick some fluff up unwittingly. Pamph hair has been nowhere near as bad for me, nor that of A. genics or various Nhandu comparatively (though GBB fluff gets up there with a differing reaction type). I'm not keen on owning something that makes me want to wear a HAZMAT suit during maintenance regardless of how cool they are. Beyond that, it's basically anything with notable, muddied genetics from hybridization. If it's really, really dicey whether I've got the real deal or something badly ID'ed and crossed I tend to steer clear. Yes, there's a hell of a lot of species with dubious backgrounds in the hobby, but some definitely make me go "nope, I'm not forking out a big wad of money at all without some paperwork to verify where it came from and what it is".